Speed-indicator.



No. 682,929; Patented Sept. I7, 190|.

R. GUUDLAD.

SPEED INDICATOR.

(Application led Hay X0, 1901.) (llo Model.)

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UNITED STATES PATENT QFFICE.

ROBERT GOODLAD, OF SOUTHSEA, ENGLAND.

SPEED-INDICATOR.

SPECIFICATION forming part of Letters Patent N 0. 682,929, dated September 17, 1901.

Application tiled May 10, 1901. Serial No. 59,687. (No model.)

To all whom it may concern,.-

Beit known that I, ROBERT GooDLAD, a subject of the King of Great Britain and Ireland, residing at 2O Sydney Terrace, Beach road, Southsea, in the county of Hants, in that part of the United Kingdom called England, have invented new and useful Improvements in Speed-Indicators, of which the following is a specification.

This invention relates to improvements in speed-indicators, the object being to provide an instrument of that kind of simple construction which shall show the speed attained and any variation therefrom.

In carrying my invention into effect I proceed in or in about the following manner, making reference to the accompanying drawings, in Which- Figure 1 is a front View, and Fig. 2 a section, of a complete apparatus, Figs. 3, 4, 5, and 6 being front views and plans of two forms of governor to be hereinafter referred to.

I provide an outer case d, having a glass front b, and an inner case c, the Whole being made as air and dust proof as possible. The top d of the inner case c has pillars e, carrying the bridge f, through which and the top d pass the pivots of the arbor g, one of which carries the pointer 7i, above the dial t', attached to the bridge f, and the other one a fan The arbor g is encircled by the hair-spring 7c, one end of which is attached to the said arbor and the other end to the stud Z on the lid d.

In connection With this indicator I employ a governing-spring m, the free end of Which presses on the arbor g, the other end being attached to the stud n. This governing-spring is to steady the pointer hwhen the indicator is subjected to much vibrationbr jarring when running over rough roads or attached to shaky machinery. Instead of the spring m pressing on the arbor g it may press on a disk, such as o, (see Figs. 3 and 4,) which has a helicoidal slope on one face, as shown at 02, this disk having also a gap o3 at that part of its periphery corresponding to the zero of the dial t'. The disk o fits tightly on the arbor and is pressed home against a shoulder, which extends some little Way above the hair-spring collet.

At the bottom of the outer case a are ballbearings p, in which runs the spindle q of the driving-fan r. A socket s is provided for coupling the spindle q to the spindle t, which receives motion to set the indicator-in operation. The spindle tis rotated by any convenient means suitable to the purpose for which the indicator is used. For instance, if the indicator is to be used with a cycle or other Wheel I provide the spindle t with a roller tt, Which runs in contact With the rim of the Wheel, the case of the indicator having a pillar o, by which it can be clipped or otherwise attached to some convenient part of the ve-V hicle. Again, by substituting a fan for the rolleru the appliance can be used as an ane* mometer or other instrument for indicating the speed of air or iuid currents. Also by pressing the end of the spindle against the end of a revolving shaft the speed of the shaft can bc ascertained, as also the regularity of its runn-ing. The bearings p and the connecting arrangements s are covered in bya dust-cap w. If the indicator is only to be used for motion in one direction, a stop or may be provided at zero to prevent the pointer h going back too far. When, however, the indicator is employed for motion in more than one direction, I dispense with the stop on and have a second series of numerals or Words reading in the opposite direction. In this case the governing-spring m presses on a disk, such as 04, (see Figs. 5 and 6,) which is sloped upward from the zero-gap o5 in both directions till it attains its greatest thickness ata point diametrically opposite to the gap.

The dials of the indicators are graduated by trial, and there is sufficient uniformity in hair-springs to allow of one trial serving for the graduating of a large number of dials.

As a recording-anemometer the pointer h may be extended in length and move over a clockwork-rotated suitably-arranged card.

What I claim as my invention, and desire to secure by Letters Patent, is

In speed-indicators operated by a drivingfan rotated by the force or motion of which the speed is to be ascertained and wherein the readings are controlled by a spiral spring surrounding the arbor of the pointer, a governor IOO consisting of adiskhavingits axis coincident In testimony whereof I have signed my with the axis of the arbor and having a helinaine to this specification in the presence of 1o coidal face on which presses the free end of a two subscribing Witnesses. spring one end of which is attached to a suitf 5 able stud, the said disk having also a gap at ROBERI GOODLAD a part of its periphery corresponding with Witnesses: that of zero on the dial substantially as de- JOHN CROMWELL COSENS PRIOR, scribed. WILLIAM J. RoAoH. 

